Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6921cd2de72cf4…

MALICIOUS

PDF

80.3 KB Created: 2021-03-07 02:28:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: df5ab62e95b953f761a7aba0548e5300 SHA-1: 0e807d541b426658b3c60d2a9c5ea4abec1f8a17 SHA-256: eb6921cd2de72cf49d6244f60f17e9c6c0b3ccaa5e5ecedad3ff160b0fb237d0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, with one prominent URL pointing to zajinet.ru, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though partially garbled, includes a title related to health, which is a common lure for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/strik?utm_term=how+do+you+get+rid+of+back+pain+during+your+period PDF link annotation
    • http://jikitosot.22web.org/mijadowavutajokefo.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/AAihMPU/applock_pro_gomo_apps.pdfIn PDF document text
    • http://copyrightshelpscenters.com/word_flash_cards_templatevczns.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/gePihgg/dodapevawub.pdfIn PDF document text
    • http://kiparegazeratax.getenjoyment.net/sularor.pdfIn PDF document text
    • https://cdn.sqhk.co/kegimovotol/ayIvZX7/scary_halloween_sounds_app.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/rdrv4he/off_road_land_rover_defender_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/punenekebi/dp6hiIj/62489863137.pdfIn PDF document text
    • http://expo-kit.ru/how_to_control_fungus_gnats_in_greenhousefhowu.pdfIn PDF document text
    • http://7gusevshop.website/27262669965g59lr.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/gugokawilisake.pdfIn PDF document text
    • http://gowitobo.iblogger.org/selogolupapewusezuzuzir.pdfIn PDF document text
    • http://laura-egorova.ru/fogafozuwesezabbbwyf.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/oVjeyRI/lavedisi.pdfIn PDF document text
    • http://cmb-societe.com/farragut_north_playsehlu.pdfIn PDF document text
    • https://cdn.sqhk.co/jibezilesu/cygidjj/pocket_rocket_bike_pump_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/VVtDfDI/gibawakanodomuzaxopa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fefekug.rf.gd/kekimemis.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/51284246025.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/aitken_spence_plc_annual_report_2017_18.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/chiswick_house_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/asset_management_company.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/csk_whistle_podu_audio_song_2018.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5E 5472 bytes
SHA-256: 3feca3bbc81df38e8af79d3425f9e2e68fd34a2899772bb843f31d1833ea707d
font_01_sfnt_off00011026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11026 10384 bytes
SHA-256: db97f0f9e74f618566173f939745f230882e96be42ce718a368e422f8d564f3c

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